Bugfix; feature

* Add BVersion::clear method
* Fix BVersion: rename "minor", "major", etc.
* Remove BeQt::variantToData and BeQt::dataToVatiant functions
* Remove BGuiPluginInterface::handleSettings method
* Remove old methods from BPluginsSettingsTab
* Add ability to set compression for every network operation independently
* Add version information to plugins
* Add Help information to plugin info
* Rename PluginInfoStatic into StaticPluginInfo
* Rename BGuiPluginInterface settingsTab method into createSettingsTab
* Fix BPluginsSettingsTab About dialog version
* Overload BAboutDuialog::setAppVersion method
* Rename BPluginWrapper::interfacetestFunction into interfaceTestFunction
* Add working directory argument to BeQt::startProcessDetached function